This Flashlight Mount has a very short projection, in doing so it stays very close to the weapon hugging the rail system in the closest configuration possible. The advantage to this mount is less chance of the weapon snagging on close quarter obstructions. This mount was designed around the Surefire 6P, it has a 1” Inch bore and will fit other brands of lights having a 1” inch: body. It is manufactured to fit MIL-STD-1913 Rail Systems. Made from 6061-T6 Aluminum, and finished per Military Specification MIL-A-8625 Black Anodized finish .